Hand-operated lumber trimmer



Dec. 16, 1930. c. w. wlLLETTE HAND OPERATED LUMBER TRIMMER Filed April9, 1928 2 Sheets-Sheet l ATTO 2 sheets-*sheen 2 Dec. 16, 1930. c, w.wlLLETTE HAND OPERATED LUMBER TRIMMER Filed April 9, 192e hanger. Thiscomprises a sleeve 31A, riding shaft 9,' which sleeve has twodownwardlydi- Y rected arms 84:' and 34' each provided with a bore 30. The a1-m34(has a'hori'zontal eXtentirety by the numeral 8 is pivoted to. a shaft.

I ed'at one end on rocker arms, Vthemembers L{tl-'f' and 34:', whichwhenrocked 1n one direction'-V v1 passes about the :pulleys 21 and 28;.

31 which in turn has'its ends carried in the' bores 30. .Set screwsl 32and 33hold Vshaft two frame members 13 and 114 which are in the Vform ofarms, provided'with lifnisingsl'?V and 18 respectively. Thearms'andfhousings are Vheld together bymeans ofthebolts and 16. Thehousings haveiinwardlyprojecting` annular -faces 19 and 20 and a pulley21 is mounted within the sameand between` the hub of whichandthe-'annular faces19a`nd20 are disposed frictionlessbearings 22'.Running transversely .of the pulley 21 isfa saw arbor- 23, and a:closurefplate-Mis disposed upon one v`end ofthe arborand collars25are'disk posed upon'the oppositelydisposed end with a saw .28Adisposed therebetween. ,ThepuL ley 21 has a central rib 26 against.which the:

inner endsofthe annular faces are made to engage. A groove-274` 1sdisposed upon the ln.

ner face edge of each annular rface,-wh ichl may be drilled/withzanysuitable. material, as

felt-,to maintain `'lubricants Within the fric'- tionless bearings.. Thepulley 21 isin alignment with thepulley` 28 disposed upon'the primary.shaft 5,1' and aV Y driving element 29 .Itwillfbe seen that-thes'aw{frameis meant-v *move the pulley 21 toward rpulleyV 28,' yandwhenrocked in the oppo'site direction-more move pulley 21 away from4pulley 28. g "The i c -normal tendency of arms 34and34 is to rock awayfrom pulley 28fand-thereforemove pulley21away 1 also, byreasonof,'the'grayitational pull on lever 151.7and `weight-12. 'This fmovement islimited'bythebeltf29, which will'. at all times betightened'suliciently to drive4 thejpulley 21. fThetightness imposed upon.

the driving element 29 isdependent upon' the i position of the yweight12.Y Thenormal pof'V sition v ofthe saw 26 'disposed 'upen the arbor 28, isthat of beingraisedhor elevated and outsof 'contact withr thematerial .passing thereunder upon the tablegandfwhenitis;` desired toactuate-any one of the cutffoH saws to cutthezmaterial atanys'peciedposition,

This is accomplished thefollowingman Y the particular saw to `beactuated?i'slowered.

Each of the heads is depending from -allink motion'orla'zyftong's,

.: of l which isV Vsecurfedtoy thelcross; supporting rod Y 35',` thesame being adjustably-.pos'itioned Y l to the bell crank 38 is fasteneda connecting bar 40fsecured to the hand operated lever 4l. a

The :hand operated lever 41is positioned upon j a key boardVconveniently located in advance ofA che Vsa; @suspended from the super-3l-against movement.` V`Frame* 8j consists ot structure of 'the mill,any suitable sup porting element, as a fabricated frame work "f l3.Thefpositionof theloperator is conveniently'locatedtogpermit of aninspection ofthe material passingover the table and the sla-w: headthroughthef link 44, the lower end of .whi ch is secured to thesavvarbor head andthe upperf endofwhich is secured :to a counterbalancedarm 45.V The; counterb'al anced ,ar1n45 has; a knife edge lbalance "46resting"uponaffsuitablebearing. 47. The arm carries anfex'ten'sion armL19providedwith a counterbalance'flS-whichmay beadjustablyposition'edlt'.elevatel or depress thearm 49; small movementimpartedtofthehand manipulating lever '41:1Y is multiplied .in the linkj` motion34A so thatha small-movement imparted to the hand leveris multiplied ithey movement in, raisinsl and :lowering the saw} arbor ,and,headfwith-aminimum oijlex-A penditure of (muscular getfort.

YVhile theorrn of mechanism andldeseribed, admirably adapted to fulfilltheobjec't's primarily stated, lit is tobeunderstoodf'thatvit'isnotintendedto conne the .invention tQ;L the oneform ,of embodiment her.ein` 1 show n and described, rvas itl isfsuscepf A tible of. ,erribodimentin various lforms, allV eomingfwithin the "scope of. the claims whichVvf nu combinatien with a; lumber trimmer,i a saw herein'shown arborfframe'cemprisingitwocomplementary J prising af-sleeve having addwnwardly anddly'j'directedelbolwf-providedwith a n* paralleli'alignment Awith Ithesleeve; the sleeve" being pivotallyconnected withy a journalbearingblock/'by' a supporting' shaft,

j the 'rearwardly extending armfmember, hav

ing-fawei'ghted elementadjustablyfpositioned Y thereuponbeingremovablysecured to elbow oflfthefsupport bracket, the V14forwardlyfeX- tendingfarm. memberffbeing pivotally con-- nected to the 4supportbracketbya secondary shaftextendingithreugh boresof the supportbracket-, 'the's forwardly'extending' fbeing. splitand.fhavingfhousings:f with inwardly.

las

projecting annular faces, a pulley positioned within annular faces andround saw arbor 1 maintained in alignment with drivingshaft pulley.

and rearwardV respectively,the rearwardly extending .arm member -movablyconnected' with a journal bearing block by a supporting y shaft, saidjournal bearing block removably secured to the structure and means foradjust- .fr l

ing the same en said structure, a Weighted element adjustably positionedon the rear` wardly extending arm member, the forward` ,Y ly extendingarm member movably connected Y j With the rearwardly extending armmemberf by a secondary shaft passing throughbores of the support bracketsecured to rearwardly extending arm member, adjusting means on supportbracket to maintain said secondary shaft parallel to a primary driveshaft, said i forwardly extending arm member i being split i and havinghousings with inwardly projecting annular faces, a saw arbor, a j

pulley upon said arbor, the hub of `which Y being positionedwithin saidannular facesV and the rim of which being positioned exi teriorlythereto, and vfrictionless bearings fdisposedbetween the annular facesandhubs" of said pulley. n Y, y w j '-3. Ina device of thev classdescribed, in combination with a lumber Vtrimmer structureof a saw framecomprising two .lcomplemen-Y l tary arm ymembers extending forward and Yrearward respectively and movably'joined'itof a journal bearing block bya supportingshaft,

the rearwardly extending arm member hav# ing a weighted elementadjustably positioned l 7 thereon, the forwardlyA extending arm mem- -lber being split,having housings with inwardly projecting Vannular faces,a pulley positioned within `said annular faces and around saw arborsubstantiallyv as described.

crixRLEs WILLIAM wiLLETrE. I

a device of the class described, inV4 combination with a lumber trimmerstructure Y of avsaw arbor frame, comprising tvvocom-` plementaryarm-members extending forward A

